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Performer RPM intake or not?
#1696101
11/08/14 03:28 PM
11/08/14 03:28 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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OP
Senior Management
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Irving, TX
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I've been tossing around the idea of sliding a Performer RPM intake on the Imperial. I found a cheap intake locally.
The car is my 72 Imperial with a stock 440. I will be adding my Edelbrock heads and a 261* .463" cam with a 114 LSA. It is topped with a 600 cfm AFB on a stock intake.
I want torque between 1500 and 2500 rpm and don't care about power above 4500 rpm.
The engine has the stock air cleaner on it. I'm not sure if it would clear the hood or if I would need a drop base air cleaner.
It would seem a bit out of place to drop a stock iron intake on top of a set of iron heads.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Performer RPM intake or not?
[Re: Kern Dog]
#1696103
11/08/14 03:44 PM
11/08/14 03:44 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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Irving, TX
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I'm tempted but don't know if it will clear the hood.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Performer RPM intake or not?
[Re: Azzkikrcuda]
#1696105
11/08/14 03:49 PM
11/08/14 03:49 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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Irving, TX
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It'll be kinda funny popping the hood on the faded old Imperial and seeing all that aluminum on the engine.  I was really tempted to go with the HP style exhaust manifolds but I don't want to get into messing with the exhaust pipes. Mine may be a bit too old to survive welding and I don't need to drop the coin on new exhaust.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Performer RPM intake or not?
[Re: feets]
#1696109
11/08/14 05:01 PM
11/08/14 05:01 PM
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Joined: Feb 2005
Posts: 4,310
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,310
Prospect, PA
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Quote:
The car is my 72 Imperial with a stock 440. I will be adding my Edelbrock heads and a 261* .463" cam with a 114 LSA. It is topped with a 600 cfm AFB on a stock intake.
I want torque between 1500 and 2500 rpm and don't care about power above 4500 rpm.
Certainly nothing wrong with trying it. But at this power level, it will likely have nothing over the CH4B. 
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Re: Performer RPM intake or not?
[Re: feets]
#1696111
11/08/14 05:45 PM
11/08/14 05:45 PM
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Joined: Dec 2004
Posts: 10,551
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,551
Rittman Ohio
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Mine fits under the stock hood with a Summit drop base and a 4"element. You might be able to see it with this picture. Gus 
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Performer RPM intake or not?
[Re: RapidRobert]
#1696116
11/08/14 06:48 PM
11/08/14 06:48 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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Quote:
Quote:
All I want is good torque from idle up through the cruising range.
OK so what ex is on there now, the low perf logs/restricted muffs/non mandrel bends? I know you said you dont want to mess with the ex but that's the most restricted part of the overall air pump (eng) plus I would mod the dist subsystems (last). EDIT I ain't a cam guy but make the right choice there especially for the low RPM torque you are after
I'm not touching the exhaust.
Period.
End of sentence.
Why, you ask?
First, what is under the car now is a fairly nice 2-1/2" setup with nice bends, H-pipe, decent mufflers, and resonators to help quiet the sound.
Second, future mods would mean throwing it all away.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Performer RPM intake or not?
[Re: RapidRobert]
#1696119
11/08/14 07:51 PM
11/08/14 07:51 PM
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Joined: May 2003
Posts: 6,558
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,558
Downtown Roebuck Ont
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My R+D buddy flowed a stock 440 spreadbore intake and came to the conclusion CFM wise that it wouldn't give up anything up to about 5500 rpm. Whether there is a lot of runner velocity difference between the stock one and an RPM that might affect low and midrange power  . He figured there wasn't enough difference up to that engine speed between a stock one and any of the standard rise intakes ie Performer, C4B, Weiand 360 deg etc to bother changing one unless you wanted to save the weight difference. Another respected builder in my area has found the same thing dyno testing the regular rise intakes. He told a buddy of mine "pile them all on the floor, there isn't 10 hp between the lot of them". Again this is with the standard rise type intake which an RPM clearly is not. For your intended purpose I would paint those heads engine color, stick with the stock intake (plug the air injector and EGR if it has it) and spend the Performer RPM money on building and tuning a Thermoquad. 850 CFM when you need it and fuel mileage when you want it. Win win. Kevin
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Re: Performer RPM intake or not?
[Re: Twostick]
#1696120
11/08/14 08:17 PM
11/08/14 08:17 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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Irving, TX
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Thanks for the input.
I'd rather spend the money on an updated EFI system. I'd install what I have but that would be replacing the A/C compressor. I'm not into making new lines and all that stuff at this tine.
My system is currently charged with 84 ounces of R12 and I'd hate to see it get away. It blows colder than my 2012 Chrysler 200.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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